US8544512B2 - Pneumatic tire with tread having sipe - Google Patents

Pneumatic tire with tread having sipe Download PDF

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Publication number
US8544512B2
US8544512B2 US12/134,326 US13432608A US8544512B2 US 8544512 B2 US8544512 B2 US 8544512B2 US 13432608 A US13432608 A US 13432608A US 8544512 B2 US8544512 B2 US 8544512B2
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Prior art keywords
sipe
wide
wide portion
width
depth
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US12/134,326
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US20090050248A1 (en
Inventor
Toshiyuki Ohashi
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Toyo Tire Corp
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Toyo Tire and Rubber Co Ltd
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Assigned to TOYO TIRE & RUBBER CO., LTD. reassignment TOYO TIRE & RUBBER CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OHASHI, TOSHIYUKI
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
    • B60C11/1218—Three-dimensional shape with regard to depth and extending direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1272—Width of the sipe
    • B60C11/1281—Width of the sipe different within the same sipe, i.e. enlarged width portion at sipe bottom or along its length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
    • B60C2011/1209—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe straight at the tread surface

Definitions

  • the present invention relates to a pneumatic tire in which a sipe is formed in a land portion of a tread surface, and is particularly useful as a studless tire.
  • a cut called as the sipe is formed in the land portion of a block, a rib or the like, and a traveling performance on an ice road surface having a low friction coefficient is increased by an edge effect and a drainage effect generated by the sipe.
  • a linear sipe extending linearly along a longitudinal direction
  • a waveform sipe extending like a waveform and the like.
  • a tire described in Japanese Unexamined Patent Publication No. 2007-8303 is structured such as to make a tread rubber be easily deflected in a depth direction by providing a plurality of wide portions in a sipe, and absorb a deformation by the wide portions so as to inhibit an opening portion from being narrowed.
  • a tire described in Japanese Unexamined Patent Publication No. 2005-247105 is structured such that an opening portion is not completely closed in a wide portion at a time when a sipe is closed, by providing the wide portion extending in a depth direction from a tread surface so as to terminate without reaching a bottom portion of the sipe.
  • Japanese Unexamined Patent Publication Nos. 2007-8303 and 2005-247105 do not disclose a solving means thereof.
  • Japanese Unexamined Patent Publication No. 2006-36102 proposes a structure securing the collapse of the land portion after a medium stage of the wear by providing a wide portion reaching a bottom portion of the sipe from a position coming in a depth direction from the tread surface.
  • the present invention is made by taking the actual condition mentioned above into consideration, and an object of the present invention is to provide a pneumatic tire which can secure an edge effect and a drainage effect by inhibiting an opening portion of a sipe from being narrowed as well as making a rigidity of a land portion proper in correspondence to a stage of progress of a wear and securing a collapse of the land portion.
  • the present invention provides a pneumatic tire structured such that a sipe is formed in a land portion of a tread surface
  • sipe comprises:
  • a second sipe portion provided with a second wide portion in a different side from the first wide portion in a sipe width direction, and positioned in a sipe bottom portion side of the first sipe portion so as to be wider than the first sipe portion;
  • a third sipe portion provided with a third wide portion in the same side as the first wide portion in the sipe width direction, and positioned in a sipe bottom portion side of the second sipe portion so as to be wider than the second sipe portion.
  • the sipe width becomes greater in accordance that the wear makes progress, and the land portion is lowered in its rigidity and tends to be deflected.
  • the rigidity of the land portion proper in correspondence to the progressing state of the wear, it is possible to secure the collapse of the land portion, and it is possible to well achieve the ice braking performance or the like from an initial stage over a medium stage and an end stage of the wear.
  • the deformation generated by a load can be absorbed by the wide portion at a time when the load is applied to the tire, it is possible to inhibit the opening portion of the sipe from being narrowed so as to secure the edge effect and the drainage effect.
  • the second wide portion is provided in the different side from the first wide portion and the third wide portion, it is possible to absorb the deformation in a well-balanced manner in both sides in the sipe width direction.
  • it is possible to suppress the displacement of the center of arrangement of the sipe it is possible to uniformize the ground contact pressure so as to contribute to the improvement of the ice braking performance or the like.
  • the center of arrangement of the sipe is greatly deviated in the sipe width direction in the case that the second wide portion is provided in the same side as the first wide portion and the third wide portion, the ground contact pressure tends to be uneven.
  • the first wide portion has a bottom portion
  • the second wide portion extends in a depth direction from the same depth position as the bottom portion of the first wide portion or a depth position closer to a tread surface than the bottom portion of the first wide portion.
  • the first wide portion has the bottom portion, it is possible to inhibit the rigidity of the land portion from being excessively lowered.
  • the continuity of the first sipe portion and the second sipe portion is secured, it is possible to smoothly enlarge the sipe width in the process of the progress of the wear.
  • the second wide portion has a bottom portion
  • the third wide portion extends in a depth direction from the same depth position as the bottom portion of the second wide portion or a depth position closer to a tread surface than the bottom portion of the second wide portion.
  • the second wide portion has the bottom portion, it is possible to inhibit the rigidity of the land portion from being excessively lowered.
  • the continuity of the second sipe portion and the third sipe portion is secured, it is possible to smoothly enlarge the sipe width in the process of the progress of the wear.
  • the first wide portion extends in a depth direction from a depth position which is spaced from a tread surface.
  • the first wide portion since the first wide portion does not appear on the wheel tread in the initial stage of the wear, it is possible to suppress the effect of improving the collapse of the wide portion in the stage that the height of the land portion is secured and the rigidity of the land portion is low, and it is possible to bring the first wide portion into sight at a time point when the wear makes progress thereafter. Accordingly, it is possible to accurately carry out the adjustment of the rigidity of the land portion in correspondence to the stages of progress of the wear.
  • the land portion is provided with a cap rubber layer exposed to a tread surface, and a base rubber layer arranged in an inner peripheral side of the cap rubber layer and having a higher rubber hardness than the cap rubber layer.
  • the land portion is provided with the base rubber layer as mentioned above, the improvement of the rigidity of the land portion at a time when the height of the land portion is reduced by the wear is promoted, and the collapse of the land portion becomes significantly small. Accordingly, the present invention achieving the operation and effect mentioned above is particularly useful.
  • FIG. 1 is an expansion plan view showing one example of a tread surface of a pneumatic tire in accordance with the present invention
  • FIG. 2 is a side elevational view of a main portion of a block
  • FIGS. 3( a ) and 3 ( b ) are views showing an inner wall surface of a sipe
  • FIGS. 4( a ) to 4 ( c ) are side elevational views of a main portion of the block at a time of braking;
  • FIG. 5 is a vertical cross sectional view of the block
  • FIG. 6 is a side elevational view of a main portion showing a sipe structure in which a first wide portion and a second wide portion do not have any bottom portion.
  • FIG. 1 is an expansion plan view showing one example of a tread surface of a pneumatic tire in accordance with the present invention.
  • the pneumatic tire is provided with a tread pattern having a plurality of blocks 1 (one example of a land portion).
  • the block 1 is comparted by a main groove 2 extending in a tire circumferential direction and a transverse groove 3 extending in a tire width direction, and five rows of blocks 1 are arranged symmetrically with respect to a tire equator line C.
  • a plurality of (three in the present embodiment) sipes 10 each having a linear opening portion is formed in each of the blocks 1 in parallel so as to be provided with a predetermined interval.
  • the sipe 10 in accordance with the present embodiment is constituted by a both-side open sipe in which both ends are open in a sidewall of the block 1 , however, the present invention is not limited to this, but one end or both ends may terminate at an inner portion of the block 1 .
  • FIG. 2 is a side elevational view of a main portion of the block 1 , a vertical direction comes to a depth direction of the sipe 10 , and a lateral direction comes to a sipe width direction.
  • FIGS. 3( a ) and 3 ( b ) are views showing an inner wall surface of the sipe 10 , in which FIG. 3( a ) shows an inner wall surface in a left side of FIG. 2 , and FIG. 3( b ) shows an inner wall surface in a right side of FIG. 2 . As shown in FIGS.
  • the sipe 10 is provided with a first sipe portion S 1 having a first wide portion 11 , a second sipe portion S 2 having a second wide portion 12 , and a third sipe portion S 3 having a third wide portion 13 .
  • the first wide portion 11 is widened to the right side in FIG. 2
  • the second wide portion 12 is widened to the left side in FIG. 2 and is provided in a different side from the first wide portion 11 in the sipe width direction
  • the third wide portion 13 is widened to the right side in FIG. 2 and is provided in the same side as the first wide portion 11 in the sipe width direction.
  • the first wide portion 11 , the second wide portion 12 and the third wide portion 13 are provided alternately while sandwiching a sipe reference surface mentioned below therebetween along a depth direction
  • the second wide portion 12 is provided in a concave manner in an inner wall surface in FIG. 3( a )
  • the first wide portion 11 and the third wide portion 13 are provided in a concave manner in an inner wall surface in FIG. 3( b ).
  • the first sipe portion S 1 , the second sipe portion S 2 and the third sipe portion S 3 are continuously provided in a depth direction of the sipe 10 , the second sipe portion S 2 is positioned in a sipe bottom portion side of the first sipe portion S 1 , and the third sipe portion S 3 is positioned in a sipe bottom portion side of the second sipe portion S 2 .
  • the sipe 10 is open at a sipe width W on the tread surface, and the first wide portion 11 extends in a depth direction from a depth position which spaced at an interval d from the tread surface.
  • the third sipe portion S 3 reaches the sipe bottom portion.
  • a protruding height based on the sipe reference surface is larger in the order of the third wide portion 13 , the second wide portion 12 and the first wide portion 11 . Accordingly, the second sipe portion S 2 is wider than the first sipe portion S 1 , and the third sipe portion S 3 is wider than the second sipe portion S 2 .
  • the sipe widths W 1 to W 3 in the respective sipe portions satisfy a relation W 1 ⁇ W 2 ⁇ W 3 .
  • the second wide portion 12 extends in the depth direction from the same depth position as the bottom portion 11 a of the first wide portion 11 or a depth position which is closer to the tread surface side than the bottom portion 11 a of the first wide portion 11 .
  • the third wide portion 13 extends in the depth direction from the same depth position as the bottom portion 12 a of the second wide portion 12 or a depth position which is closer to the tread surface side than the bottom portion 12 a of the second wide portion 12 .
  • FIGS. 4( a ), 4 ( b ) and 4 ( c ) are side elevational views of a main portion of the block 1 at a time of braking, in which FIG. 4( a ) shows a state in which tires are new, FIG. 4( b ) shows a state in which 25% of the sipe depth wears, and FIG. 4( c ) shows a state in which 45% of the sipe depth wears.
  • a gap of the sipe width W is closed at a time of braking, whereby the inner wall surfaces of the sipe are brought into contact with each other.
  • the block 1 In an initial stage of the wear such as the state in which tires are new, since the height of the block 1 is secured and the rigidity is low, the block 1 is easily deflected and tends to be collapsed, and the edge effect generated by the sipe 10 is suitably achieved.
  • the wear makes progress and the first sipe portion S 1 appears on the wheel tread, the sipe 10 is deformed in such a degree that the gap of the sipe width W 1 is closed, at a time of braking, and the rigidity of the block 1 is lowered and tends to be deflected, in spite that the height of the block 1 is reduced.
  • the second sipe portion S 2 appears on the wheel tread as shown in FIG. 4( c )
  • the third sipe portion S 3 appears on the wheel tread subsequently. Accordingly, in spite that the height of the block 1 is reduced, the rigidity of the block 1 is lowered as mentioned above so as to tend to be deflected, and it is possible to secure the collapse of the block 1 so as to suitably achieve the edge effect.
  • the rigidity of the block 1 proper in correspondence to the stages of progress of the wear so as to secure the collapse of the block 1 , by subsequently making the first sipe portion S 1 , the second sipe portion S 2 and the third sipe portion S 3 appear on the wheel tread and enlarging the sipe width step by step, in the process that the wear makes progress.
  • the edge effect regardless of the stages of progress of the wear and it is possible to well achieve the ice braking performance or the like over the initial stage, the medium stage and the end stage of the wear.
  • the second wide portion 12 is provided in the different side from the first wide portion 11 and the third wide portion 13 , it is possible to absorb the deformation in a well-balanced manner in both sides of the sipe width direction, and it is possible to suppress the displacement of the center of arrangement of the sipe 10 . Therefore, it is possible to uniformize the ground contact pressure so as to contribute to an improvement of the ice braking performance or the like.
  • the sipe width W 1 is 0.1 mm or more larger than the sipe width W, and it is further preferable that it is 0.2 mm or more larger than the sipe width W, for making the rigidity of the block 1 proper in correspondence to the stages of progress of the wear.
  • the sipe width W 2 is 0.1 mm or more larger than the sipe width W 1 , and it is further preferable that it is 0.2 mm or more larger than the sipe width W 1 .
  • the sipe width W 3 is 0.1 mm or more larger than the sipe width W 2 , and it is further preferable that it is 0.2 mm or more larger than the sipe width W 2 .
  • the sipe width W is between 0.2 and 0.6 mm for achieving the sufficient edge effect generated by the sipe 10 .
  • D 1 /D is between 0.2 and 0.4
  • D 2 /D is between 0.2 and 0.4
  • D 3 /D is between 0.2 and 0.4, for making the rigidity of the block 1 proper in correspondence to the stages of progress of the wear.
  • d/D is between 0.1 and 0.2.
  • the depth of the wide portion corresponds to a distance in the depth direction from a position starting the widening to a bottom portion of the wide portion. It is preferable that the sipe depth D is between 30 and 80% of the depth of the main groove 2 , for achieving the sufficient edge effect generated by the sipe 10 .
  • the block 1 in accordance with the present embodiment is provided with a cap rubber layer 5 exposed to the tread surface, and a base rubber layer 6 arranged in an inner peripheral side of the cap rubber layer 5 and having a higher rubber hardness than the cap rubber layer 5 .
  • a rubber hardness (a rubber hardness measured based on a durometer hardness test (type A) of JISK6253) of the cap rubber layer 5 is between 45 and 55 degrees, and it is preferable that the rubber hardness of the base rubber layer 6 is between 60 and 70 degrees. Further, it is preferable that the base rubber layer 6 is arranged at a depth 30% or less of a depth DG of the main groove 2 based on the groove bottom of the main groove 2 .
  • the sipe density corresponding to the sipe length per unit area of the block 1 is 0.05 mm/mm 2 or more. If the sipe density is less than 0.05 mm/mm 2 , there is a case that the effect to be essentially achieved by the sipe 10 can not be achieved suitably. Further, in the light of suitably securing the rigidity of the block 1 , it is preferable that the sipe density does not exceed 0.2 mm/mm 2 .
  • the present invention is not limited to this, but may employ a waveform sipe extending in a waveform.
  • the waveform sipe since the opening portion of the sipe is hard to be narrowed in comparison with the linear sipe, it is possible to effectively secure the edge effect and the drainage effect generated by the sipe in cooperation with the effect of inhibiting the opening portion from being narrowed by the wide portion mentioned above, and it is possible to inhibit the block 1 from being collapsed on a dry road surface.
  • the pneumatic tire in accordance with the present invention is the same as the normal pneumatic tire except that the sipe as mentioned above is provided in the land portion, and the present invention can employ any of the conventionally known material, shape, structure, manufacturing method and the like.
  • the present invention can be also applied to a so-called summer tire, however, since the present invention is excellent in the ice performance, the present invention is particularly useful as a studless tire (winter tire).
  • the tread pattern provided in the pneumatic tire in accordance with the present invention is not particularly limited. Accordingly, it is possible to apply to a block having any shapes such as a V shape, a polygonal shape, a curve keynote or the like, in place of the block having the rectangular shape in the plan view. Further, it is possible to employ a rib extending in a linear shape or a zigzag shape along a tire circumferential direction in place of the block or in addition thereto. Further, in the present invention, the sipe structure as mentioned above can be employed with respect to all the land portions within the tread pattern, however, may be employed only with respect to a partial land portion within the tread pattern.
  • FIG. 6 shows an example of a sipe structure in which the first wide portion 11 and the second wide portion 12 do not have any bottom portion.
  • the second sipe portion S 2 is wider than the first sipe portion S 1
  • the third sipe portion S 3 is wider than the second sipe portion S 2 , whereby it is possible to achieve the operations and effects mentioned above.
  • the present invention is not limited to this, but the sipe longitudinal direction may be inclined with respect to the tire width direction.
  • each of the wide portions extends straight in the longitudinal direction, however, the present invention is not limited to this, but the wide portion may have an amplitude in the depth direction so as to extend as a waveform or a zigzag shape.
  • the ice braking performance is evaluated by installing the tire to an actual car (3000 cc class FR sedan) and measuring a braking distance at a time of traveling on an ice road surface and applying a braking force from a speed 40 km/h so as to actuate an ABS, and is evaluated in four stages including a state in which tires are new, worn 25%, worn 45% and worn 75%.
  • a result of the comparative example at the state in which tires are new is indicated by an index 100, and the greater numerical value indicates the better ice braking performance.
  • the tire having the fixed sipe width of 0.3 mm is set to the comparative example, and the tire having the sipe provided with the first to third sipe portions as shown in FIGS. 2 and 3 is set to the example.
  • W 0.3 mm
  • W 1 0.5 mm
  • W 2 0.7 mm
  • W 3 0.9 mm
  • the sizes of the both are set to 205/65R15
  • the sipe depth D is set to 8 mm. Results of the evaluation are shown in Table 1.
  • the ice braking performance is lowered in accordance with the progress of the wear. It is thought that since the height of the block is reduced by the wear and the rigidity is improved, the collapse of the block becomes small and the edge effect is lowered. on the contrary, in the example, the good ice braking performance can be achieved regardless of the stages of progress of the wear. It is thought that the example can secure the collapse of the block so as to suitably achieve the edge effect by making the block rigidity proper in correspondence to the stages of progress of the wear, and it is further possible to inhibit the opening portion of the sipe from being narrowed so as to secure the edge effect and the drainage effect.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
US12/134,326 2007-08-24 2008-06-06 Pneumatic tire with tread having sipe Active 2032-05-02 US8544512B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-218688 2007-08-24
JP2007218688A JP4404922B2 (ja) 2007-08-24 2007-08-24 空気入りタイヤ

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US20090050248A1 US20090050248A1 (en) 2009-02-26
US8544512B2 true US8544512B2 (en) 2013-10-01

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US12/134,326 Active 2032-05-02 US8544512B2 (en) 2007-08-24 2008-06-06 Pneumatic tire with tread having sipe

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US (1) US8544512B2 (ja)
JP (1) JP4404922B2 (ja)
CN (1) CN101372195B (ja)
DE (1) DE102008035238B4 (ja)

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JP5562727B2 (ja) * 2010-06-01 2014-07-30 東洋ゴム工業株式会社 空気入りタイヤ
JP5432071B2 (ja) 2010-06-23 2014-03-05 東洋ゴム工業株式会社 空気入りタイヤ
JP5981949B2 (ja) * 2014-02-18 2016-08-31 住友ゴム工業株式会社 空気入りタイヤ
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JP6300691B2 (ja) * 2014-09-29 2018-03-28 東洋ゴム工業株式会社 空気入りタイヤ
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JP6585472B2 (ja) * 2015-11-05 2019-10-02 Ｔｏｙｏ Ｔｉｒｅ株式会社 空気入りタイヤ
CN111511585B (zh) * 2017-12-20 2022-05-31 米其林企业总公司 带有刀槽花纹的轮胎胎面

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JP2005104194A (ja) * 2003-09-29 2005-04-21 Yokohama Rubber Co Ltd:The 氷雪路用空気入りタイヤ
JP2005161967A (ja) 2003-12-02 2005-06-23 Bridgestone Corp 空気入りタイヤ
JP2005247105A (ja) 2004-03-03 2005-09-15 Toyo Tire & Rubber Co Ltd 空気入りラジアルタイヤ
JP2006036102A (ja) 2004-07-29 2006-02-09 Toyo Tire & Rubber Co Ltd 空気入りタイヤ
JP2006069440A (ja) 2004-09-03 2006-03-16 Bridgestone Corp 空気入りタイヤ
JP2006298057A (ja) 2005-04-18 2006-11-02 Sumitomo Rubber Ind Ltd 空気入りタイヤ
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Publication number Priority date Publication date Assignee Title
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US6116310A (en) * 1996-07-24 2000-09-12 Bridgestone Corporation Pneumatic tire
US20030101851A1 (en) * 2001-03-23 2003-06-05 Goodyear Tire & Rubber Company Composite blade
JP2005104194A (ja) * 2003-09-29 2005-04-21 Yokohama Rubber Co Ltd:The 氷雪路用空気入りタイヤ
JP2005161967A (ja) 2003-12-02 2005-06-23 Bridgestone Corp 空気入りタイヤ
JP2005247105A (ja) 2004-03-03 2005-09-15 Toyo Tire & Rubber Co Ltd 空気入りラジアルタイヤ
JP2006036102A (ja) 2004-07-29 2006-02-09 Toyo Tire & Rubber Co Ltd 空気入りタイヤ
JP2006069440A (ja) 2004-09-03 2006-03-16 Bridgestone Corp 空気入りタイヤ
JP2006298057A (ja) 2005-04-18 2006-11-02 Sumitomo Rubber Ind Ltd 空気入りタイヤ
JP2007008303A (ja) 2005-06-30 2007-01-18 Toyo Tire & Rubber Co Ltd 空気入りタイヤ

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Title
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Machine translation for Japan 2006-298057 (machine translation). *
Office Action (Aug. 21, 2009) in counterpart Chinese Appln 200810210882.9 and English translation.
Office Action dated Jul. 13, 2009 in counterpart JP Application 2007-218688.
Translation for Japan 03-169723 (no date). *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3763548A1 (en) 2016-12-27 2021-01-13 Pirelli Tyre S.p.A. Tyre for vehicle wheels
US11912070B2 (en) 2016-12-27 2024-02-27 Pirelli Tyre S.P.A. Tyre for vehicle wheels

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CN101372195B (zh) 2010-12-08
US20090050248A1 (en) 2009-02-26
JP2009051309A (ja) 2009-03-12
DE102008035238B4 (de) 2014-11-06
DE102008035238A1 (de) 2009-02-26
CN101372195A (zh) 2009-02-25
JP4404922B2 (ja) 2010-01-27

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